We study a level-set method for numerical shape optimization of elastic structures. Our approach combines the level-set algorithm of Osher and Sethian with the classical shape gradient. Although this method is not specifically designed for topology optimization, it can easily handle topology changes for a very large class of objective functions. Its cost is moderate since the shape is captured ...

We develop a variational method to recover both the shape and the reflectance of a scene surface(s) using multiple images, assuming that illumination conditions are fixed and known in advance. Scene and image formation are modeled with known information about cameras and illuminants, and scene recovery is achieved by minimizing a global cost functional with respect to both shape and reflectance...

The transfer of geometrical data from CAD (Computer Aided Design) to FEA (Finite-Element Analysis) is a bottleneck of automated design optimization procedures, yielding a loss of accuracy and cumbersome software couplings. Isogeometric analysis methods propose a new paradigm that allows to overcome these difficulties by using a unique geometrical representation that yields a direct relationship...

RRsumm. La technologie Javaa4] fournit le support nncessaire la conception et au ddveloppement de plate-formes permettant de ggrer des rrseaux hhttroggnes. Un des buts du projet JEM, Experimentation environMent for Java, menn au LaBRI est de concevoir et de ddvelopper une telle plate-forme. Le projet JEMM6] consiste : fournir une plate-forme distribuue qui facilite l'utilisation des rrseaux de ...